Why do I want a baby?

Why do I want a baby?I dont understand why i want a baby .. Ive wanted one since i was 15 years old and the older the get the more i feel that i want a child ... its not that i want something to love, its not that i want something to love me like all these teeens want ,its just theres no explaining this .. I had a miscarriage 2 years ago and i was left with the want of a baby ... i feel afraid that maybe theres something wrong with me for wanting a child and i see all the people thta shouldnt have kids having them, all these irresponsible teens that are always drinking and partying and i dont understand why god cant choose me .